Tool set for a powder compacting press

ABSTRACT

The method and the order of assembly of the several operating punch and core rod parts with reference to the die plate and to each other is such as to insure extremely close accuracy in the compacted parts produced. Of particular importance is the step in which the core rod retaining plate is clamped to the die plate during assembly of the guide posts to the die plate and during the setting of the guide post adhesive binding them to the die plate.

United States Patent [191 De Troyer et al.

[ 41 TOOL SET FOR A POWDER COMPACTING PRESS [75] Inventors: Georges D. De Troyer, Grosse Ile;

Raymond P. De Santis, Royal Oak, both of Mich.

[73] Assignee: Wolverine-Pentronix, lnc., Lincoln Park, Mich.

[221 Filed: Aug. 23, 1972 [21] App]. No.: 283,172

[52] U.S. Cl. 29/464, 425/78 [51] Int. Cl B23q 3/00 [58] Field of Search 29/464, 465, 466, 467,

[56] References Cited UNITED STATES PATENTS 3,640,654 2/1972 Smith 425/345 3,593,366 7/1971 Smith 425/78 3,574,892 4/1971 Smith 425/78 Apr. 23, 1974 3,414,940 12/1968 Smith 425/195 3,344,213 9/1967 Vinson..

3,328,842 7/1967 Vinson..

3,328,840 7/1967 Vinson 3,621,534 11/1971 De Troyer..... 18/165 Primary Examiner-Richard J. Herbst Assistant Examiner-James R. Duzan Attorney, Agent, or Firml-1auke, Gifford, Patalidis & Dumont 5 7 ABSTRACT The method and the order of assembly of the several operating punch and core rod parts with reference to the die plate and to each other is such as to insure extremely close accuracy in the compacted parts produced. Of particular importance is the step in which the core rod retaining plate is clamped to the die plate during assembly of the guide posts to the die plate and during the setting of the guide post adhesive binding them to the die plate.

25 Claims, 8 Drawing Figures 1 TOOL SET FOR A POWDER COMPACTING PRESS BACKGROUND OF THE INVENTION and reliability by reason of the method whereby it is assembled and the proper relationship maintained between its parts and the die. The present invention is particularly appropriate for assembling and fabricating a tool set which includes both punches for compacting and core rods associated with each of the punches for providing a finished compacted part with an aperture in it.

2. Description of the Prior Art The present invention provides an improved method of assembling and fabricating tool sets for use with multiple cavity dies. It is particularly suitable for use with work station positioners and compacting presses of the type shown and described in U.S. Pat. No. 3,574,89 2 issued on Apr. 13, 1971 to Joseph E. Smith for Powder Compacting Press, which patent is of common ownership with the present application. The apparatus disclosed in the aforementioned patent includes a press and associated tooling for the purpose of manufacturing compactedarticles, such as toroids, beads, pellets and the like, made of powdered ferrite, glass or other like substances capable of forming a compacted article upon the application of pressure in a confined die cavity.

In the powder compacting press which is disclosed in the aforementioned patent, the articles are compacted and formed in a multiple cavity die forming part of the punch and die set with the finished articles being automatically ejected from the die cavities, removed by a pickup head, and dropped through discharge ports into suitable receptacles. The work station positioner assembly, which is an operating part of the press, is mounted above and movable transversely over the upper surface of the die plate. The positioner assembly carries a powder dispenser, an anvil and a pickup head. The powder dispenser is supplied with powder from a primary powder supply means connected to it by a flexible tubing. The powder dispenser is first positioned over the cavities, which are thus filled with powder, as the punches are first displaced downwardly in order to draw a predetermined amount of powder into the die cavities. The dispenser is then removed from above the die cavities by the subsequent angular motion of the work station positioner assembly. The anvil is next positioned over the die cavities and then clamped in place over the die cavities by means of a pivotable clamp supported above it and actuated in timed relationship with the upward press movement of the punches. The anvil is then removed from its position over the die cavities and is replaced by the pickup head as a result of a further angular movement of the work station positioner assembly transversely across the upper surface of the die plate. The punches are then displaced upwardly in order to bring their upper ends into a substantially flush alignment with "the upper surface of the die plate. In this manner, the finished compacted articles are ejected from the die cavities and then picked up by the pickup head. As the result of a return angular motion of the work station positioner assembly to the initial fill in the aforementioned patent is particularly suitable for use in conjunction with a tool set assembled in accordance with the teachings of the method of the present invention.

SUMMARY OF THE INVENTION In accordance with the method of the present invention, a tool set including punches and core rods and their holding parts are assembled in an order and in a manner which provides successive reference arrangements of the critical parts one to the other, thus assuring the accuracy of their relative alignment and movement during press operation. The steps of assembly include the preliminary arrangement of the rearwardmost plate holding the core rods relative to the guide posts and the die plate. Then, using the core rod plate as a fixture, the guide posts are assembled in the die plate. The guide bushings are firmly fitted, either by press-fit or adhesive binder, into the stem plate which forms a part of the mounting for the movable punches as the punch support plate is moved upwardly and downwardly on the guide plate.

BRIEF DESCRIPTION OF THE DRAWINGS The description herein makes reference to the accompanying drawings wherein like reference numerals are used to refer to like parts where they may occur throughout the several views, and in which:

FIG. 1 is a top plan view of a multiple cavity die plate and punch assembly tool set as they would be mounted for operation in a powder compacting press;

FIG. 2 is a sectional view taken along the line 2-2 of FIG. 1 partly to reduced scale to illustrate the assembled position of several different operating parts of the tool set and their relationship to each other and to the upper die plate and cavities;

FIG. 3 is a spread perspective of the tool set inverted with respect to the showing of FIGS. 1 and 2 to better clarify the construction of the parts and the method by which the parts would be assembled into a finished complete tool set; and

FIGS. 4, 5, 6, 7 and 8 are schematic views partly in section, with parts broken away, illustrating the several sequential steps used in assembling a tool set according to the method of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings and with particular reference to FIG. 1, there is shown a die plate 10 which is positioned on a press table 11 as part of a powder compacting press of the general type disclosed in the aforementioned US. Pat. No. 3,574,892. The die plate 10 has an upper surface 12 and is held to the press table 11 by suitable means, such as die clamp plates 14 and 16. A pair of screws 18 and 20 are: included which extend through predrilled and tapped holes in the plates 14 and 16 and into the press table: 11. In the embodiment illustrated there are shown fourteen die cavities, although the number may vary widely according to the production requirements and the size of the parts. The

several die cavities are indicated by the numeral 22. Each die cavity 22, which may be chamfered, further has mounted in it a die bushing 24, with the upper end of the die bushing being aligned flush with the upper surface 12 of the die plate 10. Each die bushing 24 further has a centrally located bore 26 which is shown as being of a circular cross section, although it will be obvious that the bore shape may as well be rectangular, square or of any other appropriate cross-sectional shape according to the desired peripheral shape of the article to be compacted. The bore 26 extends downwardly from the upper surface 12 over the die plate substantially all the way through the width of the die plate 10. The lower openings of the bushings 24 may be chamfered to provide for easier entry of the punches upwardly into the die bushings 24 during press operation.

The die plate 10 is further provided with a pair of oppositely disposed, vertical bores 28 and 30. Adapted to be held in each of the bores 28, 30 are a pair of guide posts 32, 34, respectively. The guide posts 32 and 34 are of an elongated cylindrical shape and are preferably retained within the respective bores 28, 30 by a suitable adhesive or bonding compound hardenable by heat. One example of a bonding compound which may be used is known and sold under the name Loctite, currently manufactured by the Loctite Corporation, Newington, Connecticut. This compound is particularly useful in bonding cylindrical shaped parts and provides a high sheer strength between the adjacent interfaces. Accordingly, it and like compounds are particularly useful in one step of the assembly method.

Also shown in FIG. 1 are threaded fasteners 36 and 38 which are used to attach adjacent punch holding and retaining parts of the tool set together, as will be better shown and explained in connection with FIG. 3 hereinafter. A screw 80 is shown which is used to fasten the core rod retaining plate 66 to one of the guide posts 32.

FIG. 2 shows the tool set 40 as it is mounted below the die plate 10 during operation of the press. One of the guide posts 34 is shown as it is used to support the stationary parts of the tool set 40 in spaced relationship to the die plate 10. It is necessary that the guide posts 34 and 32 both be mounted normal to the flat surfaces of the die plate 10. FIG. 2 also clarifies the manner in which the die clamp plates 14 and 16 hold the die plate 10 firmly in place on the press table 11. The clamp plate 14 has a rightwardly extending upper marginal portion 140 which overlaps a mating lateral extension 10a at the left hand edge of the die plate 10. In like manner, the clamp plate 16 has a leftwardly extending upper marginal portion 16a which overlaps a mating lateral extension 10b of the die plate 10. A relief may be provided on portion 16a as shown to assure more positive clamping by three-point contact.

The tool set 40 further includes the basic moving and operating parts, namely the punches 42. Each punch 42 includes an upper reduced diameter portion 42a and a lower enlarged cylindrical portion 42b. The upper portion 42a is driven upwardly into the die cavity 22 during each press operation. Additionally, each of the punches 42 is retained in a recessed, cut-out portion 43 formed along the edges of a punch support or mounting plate 50. The punch mounting plate 50 is of a generally rectangular configuration and provides in a symmetrical arrangement for a number of punches 42, each opposed to an associated die cavity 22. The punch mounting plate 50 further includes a pair of bores 51, one of which is shown, in which there is inserted one of a pair of guide bushings 52. The guide bushings 52 are both slidably movable relative to one of the two guide posts 32, 34.

It will further be seen that the guide bushings 52 each pass through a complementary bore 53, both of which bores are formed in a stem plate 54 which functions as a punch retaining plate. The stem plate 54 is held with its upper surface flush against the lower surface of the punch mounting plate 50, thus securely retaining in place each of the punches 42. Additionally, each punch may be attached to the punch mounting plate 50 by a suitable adhesive applied between the parts. An upper resilient pad may be included between the upper surface of the enlarged portion of punch 42 and the punch mounting plate to compensate for punch manufacturing tolerance. In addition, a second resilient pad 45 may be mounted between the lower surface of the enlarged portion of punch 42 and the opposed surface of the stem plate 54. This arrangement assists in holding the punches 42 in position while compacting. Each of the punches 42 has an internal bore 42c adapted to receive and be journalled on a core rod 56. Thus, each punch 42 is slidably movable along its associated core rod 56. Each of the core rods 56 includes an enlarged portion 56a and a reduced portion 56b. In a like manner to the mounting system provided for the punches 42, each core rod 56 is held in place througe its engagement in a mating recess 61 formed about the core rod plate 62. In connection with the core rods 56, it should be noted that an opening is provided along the edges of the stem plate 54 to allow passage of each core rod 56 into the punch bore 420 aligned with it.

There is also included a resilient pad 64 between the lower end of each core rod 56 enlarged portion 56a and the upper surface of a core rod retaining plate 66. The resilient pad 64 is of importance with respect to the operation of the tool set. It is important that each core rod be properly aligned with the mating bore 42c of its associated punch 42. Otherwise, during press operation, the core rod end 56b would tend to cause a binding in the mating punch bore, which might result in breakoff of the core rod itself or in excessive wear of the internal punch bores 42c. Insertion of the resilient pad 64 in the position indicated makes it possible for the core rod 56 to deflect slightly both during assembly and subsequently during the longitudinal movement along the associated bore of the punch 42.

It will be understood that while the resilient pads 64 are shown in FIG. 3 as separate parts of the assembly, they may be incorporated in each case as a resilient coating applied to either the enlarged end portions 56a of the core rods 56 or applied to that portion of the opposed surface of the core rod retaining plate 66 which holds the individual core rods 56 firmly seated in the recesses 61 formed about the edges of the core rod mounting plate 62. Suitable materials for use as a resilient coating are nylon, teflon or the like. An important advantage arising from these resilient mounting means is that the core rods 56 are themselves rendered readily replaceable in the tool set 40. This represents a distinct advancement with respect to prior art tool systems in which core rods are rigidly retained in place by binder materials.

-.t t P a e in the e s yitiss Also shown in the FIG. 2 drawing is a threaded fastener 70 which is used to secure the core rod retaining plate 66 to the core rod mounting plate 62. It will further be seen that the stern plate 54 terminates in a shaft 72, the lower end 74 of which is adapted to receive the upward drive from the press operating mechanism, not shown, which moves the movable punch parts of the tool set 40 in an appropriate direction to accomplish the several different stages of operation, namely, fill, press and eject.

With reference to FIG. 3, it will be understood that the parts, already referred to in FIG. 2 as the parts of the tool set 40, are shown in a position which is inverted from that in which the final tool and die set would be used in the press. The tool set 40 and the die plate are accordingly illustrated in a position which clarifies their structural configuration as well as the general manner in which they would be assembled on a work bench before being mounted in a press.

FIG. 4 illustrates the first stage in the process of assembling a tool set according to the present invention. The parts are all cleaned, demagnetized and then grouped in the general arrangement as shown in FIG. 3 preparatory to assembly. FIG. 4 illustrates the first step in the assembly procedure, which comprises mounting the die bushings 24 in each of the die cavities 22 provided in the die plate 10. A suitable bonding material, such as the Loctite" adhesive previously referred to, is first applied about the periphery of each die bushing 24. Each die bushing 24 is then pressed into the die cavity 22 with the bushing end flush with the surface of the die plate 10. It may be preferable to permit the die bushings 24 to extend slightly above the upper surface of the die plate 10 to permit their subsequent lapping. The die plate 10 is then placed into a heating chamber to cure the die bushing-die plate assembly at approximately 250- for about minutes. Alternately, the die bushings 24 may be press-fitted FIG. 5 shows the next step used in the assembly of the tool set 40, which comprises using a bonding agent about the periphery of each of the two guide posts 32, 34 to seal the posts into the bores 28, 30, respectively, in the die plate 10. The guide posts, as illustrated with the guide post34, arepushed beyond the lower surface of the die plate 10 and the extending lower end portion may have more binding applied to it. The die plate 10 with the guide posts 32, 34 is placed flat on the work table and the core rod retaining plate, the plate in the assembly farthest spaced from the die plate 10 in the completed assembly, is placed with its vertical bore portion 69 aligned and slid down on guide posts 32, 34, respectively, until the adjacent faces of the plates are in abutment. A C clamp 82 is then tightened in place to hold the core rod retaining plate 66 in place to operate as a holding fixture and allow the adhesive to set. The set screws 80 are tightened after the guide posts are pushed back in the die plate until the ends are flush or slightly below the front surface of the die plate. After about 5 minutes, the die plate 10 guide post assembly may be removed and heat cured in the manner described above.

FIG. 6 shows the next step of assembly in which the punch mounting plate 50 is slipped over the two guide posts 32, 34 and the punches 42 are inserted in place in the cut-out recesses 43 formed in it and the lower reduced diameter punch ends 42b are inserted into the opposed die bushings 24. The resilient pads 45 may also be inserted in place. The stem plate or punch retaining plate 54 is next slid onto the guide posts 32, 34 with the two guide bushings 52 loosely held in the guide posts holes 51, 53. With the die bushings 52 inserted into both the punch mounting plate and punch retaining plate 54, the two fastener screws 36 and 38, which hold the two plates together, are inserted and tightened to clamp the enlarged punch head portions 42a in tight holding engagement. A suitable bonding agent must be applied to the surface of the two guide bushings 52 to further secure these in place. The guide bushings 52 are then pushed downwardly so that they will be engaged into both plates 56) and 54 but bonded only to the upper stem or punch retaining plate 54. This assembly procedure may also be done without the punches assembled in the die bushings.

The next step of assembly is illustrated in FIG. 7, which includes sliding the core rod mounting plate 62 bores 63 on the two guide posts 32 and 34. The core rods 56 are then inserted in place in each of the cut-out recesses 61 formed along the edges of the core rod mounting plate 62. In each case, the core rod 56 has its lower end 56b of reduced diameter extending all the way through the longitudinal bore 420 provided in the opposed punch 42. It will be seen that the length of the core rod end portion 56b is sufficient to extend all the way through the cavity 22 provided in the die plate 10. In addition, a resilient pad 64 is placed on the upper end portion 56a of each core rod 56.

The next step, illustrated in FIG. 8, includes mounting the core rod retaining plate 66 bores 69 on the guide posts 32 and 34, sliding it downwardly and then fastening the retaining plate 66 securely to the guide posts 32 and 34 through pair of set screws 80, one of which is shown. The retaining plate 66 will be seen to then confine the enlarged head portions 56a of each core rod 56 securely in place preparatory to operation of the tool set 40. It will be understood that in accordance with normal procedure, there may be included a final grinding and lapping operation to provide a flat planar surface and to eliminate any protruding parts of the assembly components which might otherwise interfere with satisfactory operation of the tool set.

It will thus be seen that the tool set 40 assembled in accordance with the steps outlined! above will have an accuracy greatly improved over that of prior art tool sets having similar components. The method of assembly utilizes a completely reliable procedure of referencing: first, the core rod retaining plate 66 to the guide posts 32, 34; second, the guide posts 32, 34 to the die plate 10; and, finally, the guide bushings 52 with respect to the punch retaining or stem plate 54. The various other steps disclosed and the alternatives set forth further contribute to the improved accuracy and reliability of the compacting die tool set.

What is claimed is:

l. The method of assembling a tool set for use in a compacting press with a die plate having a die cavity, said tool set including at least one guide post, at least one punch having a longitudinal bore, a plate for mounting of said punch, said plate slidably movable on said guide post, at least one core rod slidable through said punch bore, a plate for mounting said core rod in a position aligned with said longitudinal bore in said punch, said core rod plate having a bore adapted to engage said guide post in holding engagement, wherein the method comprises the steps of:

a. inserting saidguide post in a mating bore formed in said die plate;

b. clamping said plate for mounting said core rod with its face against the face of the die plate to align said bores in said die plate and said core rod mounting plate, respectively, on said guide post;

c. applying an adhesive to that portion of the guide post to be seated in the die plate bore;

d. clamping said plates and the guide post together in alignment securing guide post in core rod plate during setting of the adhesive;

e. unclamping and removing the core rod mounting plate;

f. sliding the punch mounting plate onto said guide post;

g. inserting the punch in the punch mounting plate;

h. fixing a guide bushing in the bore of said punch mounting plate to allow free sliding movement of the punch mounting plate on the guide post;

. mounting the core rod in said core rod plate in alignment with a punch longitudinal bore and said die cavity; and

j. remounting the core rod mounting plate on the guide post and attaching the two together in spaced relationship to the die plate.

2. The method as set forth in claim 1 wherein the step (j) of attaching the core rod mounting plate to the guide post comprises holding the two together by a threaded fastener extending through the plate into engagement with the guide post.

3. The method as set forth in claim 1 wherein the step (d) of clamping said plates and the guide post together in alignment during setting of the adhesive comprises holding said core mounting plate against the face of the die plate by a C clamp device.

4. The method as set forth in claim 1 wherein said step (c) of applying an adhesive to the guide post comprises first extending the guide post so that one end extends beyond the die plate, then applying the adhesive, and finally drawing the guide post back into its proper position in the die plate.

5. The method as set forth in claim 1 wherein the step (h) of fixing the guide bushing in the bore of the punch mounting plate comprises attaching it thereto by an adhesive binder.

6. The method as set forth in claim 3 including in the step (d) the securing of the guide post to the core rod plate by set screws.

7. The method as set forth in claim 1 wherein the die cavity in said die plate has a die bushing inserted therein preparatory to step (a).

8. The method as set forth in claim 7 wherein said die bushing is fastened in said die cavity by a suitable adhesive preparatory to step (a).

9. The method as set forth in claim 1 wherein there is included in the step (g) the inserting of a resilient means between said punch and said punch mounting plate.

10. The method as set forth in claim 7 wherein said die bushing is press-fitted in said die cavity preparatory to step (a).

ll. Themethod of assembling a tool set for use with a multiple cavity die plate in a compacting press, said tool set including a pair of spaced guide posts, a plurality of punches having longitudinal bores formed therein, a plate for mounting said punches, said punch mounting plate having a pair of bore portions slidably movable on said guide posts, a like number of core rods, a plate for mounting said core rods each in a position aligned with the longitudinal bores of one of said punches, said core rod plate having a pair of bores adapted to engage said guide posts in holding engagement therewith, wherein the method comprises the steps of:

a. inserting a die bushing in each of said die cavities to facilitate sliding movement of the punches therein;

b. inserting said guide posts in the mating bores formed in said die plate;

0. clamping in place said core rod mounting plate with its face against the face of said die plate such that its bores and the bores in said die plate are aligned respectively on said guide posts;

d. applying a curable adhesive to that portion of the guide posts to be seated in the die plate bores;

e. holding said plates and the guide posts clamped together in alignment during setting of the adhesive;

f. removing the core rod mounting plate and sliding the punch mounting plate bore portions onto the guide posts;

g. inserting the punches in recesses formed in the punch mounting plate;

h. inserting a guide bushing in each bore portion of said punch mounting plate to allow its sliding movement on the guide posts;

. mounting the core rods in said core rod plate, each in alignment with a punch longitudinal bore and slidable therethrough;

j. remounting the core rod mounting plate on the guide posts; and

k. fixing said core rod mounting plate on said guide posts in a predetermined spaced relationship with the die plate.

12. The method as set forth in claim 11 wherein the step (a) comprises press-fitting each die bushing in its associated die cavity.

13. The method as set forth in claim 11 wherein the step (a) comprises attaching each die bushing by an adhesive in its associated die cavity.

14. The method as set forth in claim 1 1 including the further step of mounting a resilient pad between the end of each of said core rods farthest spaced from said die plate and the core rod mounting plate.

15. The method as set forth in claim 11 including the further step of binding each of said punches to the punch mounting plate by an adhesive binder.

16. The method as set forth in claim 1 1 including the further step of applying a resilient material coating to the core rod mounting plate juxtaposed to each of said core rods.

17. The method of assembling a tool set for use with a multiple cavity die plate in a compacting press, said tool set including a pair of spaced guide posts, a plurality of punches having longitudinal bores formed therethrough, a plate having a plurality of marginal recesses for mounting said punches, a second punch retaining plate for attachment to said punch mounting plate for holding the punches securely in place, said punch mounting plate and said punch retaining plate each having a pair of aligned bore portions slidably movable on said guide posts, a like plurality of core rods, a plate for mounting said core rods each in a position aligned with the longitudinal bore of an associated one of said punches, a core rod retaining plate operable to be held in engagement with said core rod mounting plate to hold said corerods securely in place, said core rod mounting and retaining plates each having a pair of bore portions aligned to engage said guide posts in holding engagement therewith and in spaced relationship to the die plate, wherein the method comprises the steps of:

a. inserting said guide posts in a pair of mating bores therefor formed in said die plate;

b. positioning said core rod retaining plate against the opposed surface'of the die plate with its bore portions journalled on said guide posts;

0. using the core rod retaining plate as a fixture for holding it, the guide posts and the die plate in alignment;

d. applying an adhesive to that portion of the guide posts to be seated and secured in the die plate bores;

e. holding the plates and the guide posts together in alignment during setting of the adhesive;

f. removing the core rod retaining plate;

g. sliding the punch mounting plate bore portions onto the guide posts;

h. inserting the punches in the corresponding recesses formed in the punch mounting plate;

i. mounting the punch retaining plate on the guide posts to hold the punches in place in the punch mounting plate;

j. mounting the core rod mounting plate on the guide posts;

k. mounting the core rods in the core mounting plate;

1. sliding the core rod retainer plate into engagement with the core rod mounting plate for holding the core rods in alignment respectively with the punch 20. The method as set forth in claim 17 including the further step of inserting a guide bushing in at least one of said punch retaining and mounting plate bore portions for facilitating sliding movement of said plates on the guide posts.

21. The method as set forth in claim 17 including the initial step of mounting a die cavity bushing in each of said die cavities.

22. The method as set forth in claim 17 including the further step of inserting a guide bushing in the bore portions of said punch mounting and retaining plates and securing it in place with an adhesive material.

23. The method of assembling a tool set for use in a compacting press with a die plate having a die cavity, said tool set including at least one guide post, a punch mounting plate for holding at least one punch with a longitudinal bore, said punch mounting plate having a bore slidable along said post toward and away from said die plate during press operation, a. core rod mounting plate, a core rod mounted in said plate and freely slidable through said punch bore, said core rod mounting plate having a bore mountable on said guide post in spaced relationship to the die plate, wherein the method comprises the steps of:

a. inserting the guide post in a mating bore formed in the die plate;

b. sliding the core rod mounting plate on the post and into engagement with the die plate surface;

c. clamping the core rod mounting plate in place as a fixture to hold the guide post and die plate in alignment;

d. applying an adhesive to that portion of the guide post to be anchored in the die plate;

e. holding the core rod mounting plate clamped against the die plate during setting of the adhesive;

to said punch mounting plate bore.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,805,370 Dated April 23, 1974 Inventor(s) GEORGES 1). DE 'I'ROYER & RAYMOND P. DE SANTIS It is certified that error appears in the above-identified patent: and that said Letters Patent are hereby corrected as shown below:

Column 3, line 59, change "42a" to -42b-- line 60, change "42b" to --42a line 61, change "423" to --42b-.

Column 4, line 30, change "througe" to -through-- 1 line 34, following "55" insert --(FIG. 3)--.

Coliimn 5, line 49, following "plate" (first occurrence); insert -66-,

Signed and sealed this 3rd day of September 1974.

(SEAL) Attest:

McCOY 1 1. GIBsoN,'JR; c. MARSHALL DANN Attestlng Offlcer Commissioner of Patents USCOMM'DC UOS'IQ'PGF i ".5. GOVERNMENT PRINTING OFFICE ll. 0-3'0-334.

I FoRM Po-ioso (10-69) 

1. The method of assembling a tool set for use in a compacting press with a die plate having a die cavity, said tool set including at least one guide post, at least one punch having a longitudinal bore, a plate for mounting of said punch, said plate slidably movable on said guide post, at least one core rod slidable through said punch bore, a plate for mounting said core rod in a position aligned with said longitudinal bore in said punch, said core rod plate having a bore adapted to engage said guide post in holding engagement, wherein the method comprises the steps of: a. inserting said guide post in a mating bore formed in said die plate; b. clamping said plate for mounting said core rod with its face against the face of the die plate to align said bores in said die plate and said core rod mounting plate, respectively, on said guide post; c. applying an adhesive to that portion of the guide post to be seated in the die plate bore; d. clamping said plates and the guide post together in alignment securing guide post in core rod plate during setting of the adhesive; e. unclamping and removing the core rod mounting plate; f. sliding the punch mounting plate onto said guide post; g. inserting the punch in the punch mounting plate; h. fixing a guide bushing in the bore of said punch mounting plate to allow free sliding movement of the punch mounting plate on the guide post; i. mounting the core rod in said core rod plate in alignment with a punch longitudinal bore and said die cavity; and j. remounting the core rod mounting plate on the guide post and attaching the two together in spaced relationship to the die plate.
 2. The method as set forth in claim 1 wherein the step (j) of attaching the core rod mounting plate to the guide post comprises holding the two together by a threaded fastener extending through the plate into engagement with the guide post.
 3. The method as set forth in claim 1 wherein the step (d) of clamping said plates and the guide post together in alignment during setting of the adhesive comprises holding said core mounting plate against the face of the die plate by a ''''C'''' clamp device.
 4. The method as set forth in claim 1 wherein said step (c) of applying an adhesive to the guide post comprises first extending the guide post so that one end extends beyond the die plate, then applying the adhesive, and finally drawing the guide posT back into its proper position in the die plate.
 5. The method as set forth in claim 1 wherein the step (h) of fixing the guide bushing in the bore of the punch mounting plate comprises attaching it thereto by an adhesive binder.
 6. The method as set forth in claim 3 including in the step (d) the securing of the guide post to the core rod plate by set screws.
 7. The method as set forth in claim 1 wherein the die cavity in said die plate has a die bushing inserted therein preparatory to step (a).
 8. The method as set forth in claim 7 wherein said die bushing is fastened in said die cavity by a suitable adhesive preparatory to step (a).
 9. The method as set forth in claim 1 wherein there is included in the step (g) the inserting of a resilient means between said punch and said punch mounting plate.
 10. The method as set forth in claim 7 wherein said die bushing is press-fitted in said die cavity preparatory to step (a).
 11. The method of assembling a tool set for use with a multiple cavity die plate in a compacting press, said tool set including a pair of spaced guide posts, a plurality of punches having longitudinal bores formed therein, a plate for mounting said punches, said punch mounting plate having a pair of bore portions slidably movable on said guide posts, a like number of core rods, a plate for mounting said core rods each in a position aligned with the longitudinal bores of one of said punches, said core rod plate having a pair of bores adapted to engage said guide posts in holding engagement therewith, wherein the method comprises the steps of: a. inserting a die bushing in each of said die cavities to facilitate sliding movement of the punches therein; b. inserting said guide posts in the mating bores formed in said die plate; c. clamping in place said core rod mounting plate with its face against the face of said die plate such that its bores and the bores in said die plate are aligned respectively on said guide posts; d. applying a curable adhesive to that portion of the guide posts to be seated in the die plate bores; e. holding said plates and the guide posts clamped together in alignment during setting of the adhesive; f. removing the core rod mounting plate and sliding the punch mounting plate bore portions onto the guide posts; g. inserting the punches in recesses formed in the punch mounting plate; h. inserting a guide bushing in each bore portion of said punch mounting plate to allow its sliding movement on the guide posts; i. mounting the core rods in said core rod plate, each in alignment with a punch longitudinal bore and slidable therethrough; j. remounting the core rod mounting plate on the guide posts; and k. fixing said core rod mounting plate on said guide posts in a predetermined spaced relationship with the die plate.
 12. The method as set forth in claim 11 wherein the step (a) comprises press-fitting each die bushing in its associated die cavity.
 13. The method as set forth in claim 11 wherein the step (a) comprises attaching each die bushing by an adhesive in its associated die cavity.
 14. The method as set forth in claim 11 including the further step of mounting a resilient pad between the end of each of said core rods farthest spaced from said die plate and the core rod mounting plate.
 15. The method as set forth in claim 11 including the further step of binding each of said punches to the punch mounting plate by an adhesive binder.
 16. The method as set forth in claim 11 including the further step of applying a resilient material coating to the core rod mounting plate juxtaposed to each of said core rods.
 17. The method of assembling a tool set for use with a multiple cavity die plate in a compacting press, said tool set including a pair of spaced guide posts, a plurality of punches having longitudinal bores formed therethrough, a plate having a plurality of marginal recesses for mounting said punches, a second punch retaining plate for attachment to said punch mounting plate for holding the punches securely in place, said punch mounting plate and said punch retaining plate each having a pair of aligned bore portions slidably movable on said guide posts, a like plurality of core rods, a plate for mounting said core rods each in a position aligned with the longitudinal bore of an associated one of said punches, a core rod retaining plate operable to be held in engagement with said core rod mounting plate to hold said core rods securely in place, said core rod mounting and retaining plates each having a pair of bore portions aligned to engage said guide posts in holding engagement therewith and in spaced relationship to the die plate, wherein the method comprises the steps of: a. inserting said guide posts in a pair of mating bores therefor formed in said die plate; b. positioning said core rod retaining plate against the opposed surface of the die plate with its bore portions journalled on said guide posts; c. using the core rod retaining plate as a fixture for holding it, the guide posts and the die plate in alignment; d. applying an adhesive to that portion of the guide posts to be seated and secured in the die plate bores; e. holding the plates and the guide posts together in alignment during setting of the adhesive; f. removing the core rod retaining plate; g. sliding the punch mounting plate bore portions onto the guide posts; h. inserting the punches in the corresponding recesses formed in the punch mounting plate; i. mounting the punch retaining plate on the guide posts to hold the punches in place in the punch mounting plate; j. mounting the core rod mounting plate on the guide posts; k. mounting the core rods in the core mounting plate; l. sliding the core rod retainer plate into engagement with the core rod mounting plate for holding the core rods in alignment respectively with the punch bores and the centerlines of the die cavities; and m. fastening the core rod retaining plate to the guide posts for holding it and the core rod mounting plate in spaced relationship from the die plate.
 18. The method as set forth in claim 17 wherein the step (m) of fastening the core rod retaining plate to the guide posts comprises attaching them by a threaded fastening means.
 19. The method as set forth in claim 17 including the further step of fastening the punch mounting and retaining plates together by a threaded fastening means.
 20. The method as set forth in claim 17 including the further step of inserting a guide bushing in at least one of said punch retaining and mounting plate bore portions for facilitating sliding movement of said plates on the guide posts.
 21. The method as set forth in claim 17 including the initial step of mounting a die cavity bushing in each of said die cavities.
 22. The method as set forth in claim 17 including the further step of inserting a guide bushing in the bore portions of said punch mounting and retaining plates and securing it in place with an adhesive material.
 23. The method of assembling a tool set for use in a compacting press with a die plate having a die cavity, said tool set including at least one guide post, a punch mounting plate for holding at least one punch with a longitudinal bore, said punch mounting plate having a bore slidable along said post toward and away from said die plate during press operation, a core rod mounting plate, a core rod mounted in said plate and freely slidable through said punch bore, said core rod mounting plate having a bore mountable on said guide post in spaced relationship to the die plate, wherein the method comprises the steps of: a. inserting the guide post in a mating bore formed in the die plate; b. sliding the core rod mounting plate on the post and into engagement with the die plate surface; c. clamping the core rod mounting plate in place as a fixture to hold the guide post and die plate in alignment; d. applying an adhEsive to that portion of the guide post to be anchored in the die plate; e. holding the core rod mounting plate clamped against the die plate during setting of the adhesive; f. removing the core rod mounting plate; g. mounting the punch mounting plate on the guide post; and h. remounting the core rod mounting plate on the guide post and fixing it thereto.
 24. The method as set forth in claim 23 including the further step of inserting a guide bushing in said punch mounting plate to facilitate its sliding movement on said guide post.
 25. The method as set forth in claim 24 whereby said further step comprises applying an adhesive to the outer surface of said guide bushing to fasten it relative to said punch mounting plate bore. 